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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 6148 | serge | 1 | /* |
| 2 | * Copyright (C) 2012 Michael Niedermayer |
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| 3 | * |
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| 4 | * This file is part of FFmpeg. |
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| 5 | * |
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| 6 | * FFmpeg is free software; you can redistribute it and/or |
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| 7 | * modify it under the terms of the GNU Lesser General Public |
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| 8 | * License as published by the Free Software Foundation; either |
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| 9 | * version 2.1 of the License, or (at your option) any later version. |
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| 10 | * |
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| 11 | * FFmpeg is distributed in the hope that it will be useful, |
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 14 | * Lesser General Public License for more details. |
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| 15 | * |
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| 16 | * You should have received a copy of the GNU Lesser General Public |
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| 17 | * License along with FFmpeg; if not, write to the Free Software |
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| 18 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA |
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| 19 | */ |
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| 20 | |||
| 21 | #include |
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| 22 | |||
| 23 | #include "libavutil/cpu.h" |
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| 24 | #include "libavutil/common.h" |
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| 25 | #include "libavutil/opt.h" |
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| 26 | #include "libavutil/pixdesc.h" |
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| 27 | #include "avfilter.h" |
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| 28 | #include "internal.h" |
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| 29 | |||
| 30 | #define HIST_SIZE 4 |
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| 31 | |||
| 32 | typedef enum { |
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| 33 | TFF, |
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| 34 | BFF, |
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| 35 | PROGRSSIVE, |
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| 36 | UNDETERMINED, |
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| 37 | } Type; |
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| 38 | |||
| 39 | typedef struct { |
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| 40 | const AVClass *class; |
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| 41 | float interlace_threshold; |
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| 42 | float progressive_threshold; |
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| 43 | |||
| 44 | Type last_type; |
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| 45 | int prestat[4]; |
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| 46 | int poststat[4]; |
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| 47 | |||
| 48 | uint8_t history[HIST_SIZE]; |
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| 49 | |||
| 50 | AVFrame *cur; |
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| 51 | AVFrame *next; |
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| 52 | AVFrame *prev; |
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| 53 | int (*filter_line)(const uint8_t *prev, const uint8_t *cur, const uint8_t *next, int w); |
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| 54 | |||
| 55 | const AVPixFmtDescriptor *csp; |
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| 56 | } IDETContext; |
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| 57 | |||
| 58 | #define OFFSET(x) offsetof(IDETContext, x) |
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| 59 | #define FLAGS AV_OPT_FLAG_VIDEO_PARAM|AV_OPT_FLAG_FILTERING_PARAM |
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| 60 | |||
| 61 | static const AVOption idet_options[] = { |
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| 62 | { "intl_thres", "set interlacing threshold", OFFSET(interlace_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.04}, -1, FLT_MAX, FLAGS }, |
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| 63 | { "prog_thres", "set progressive threshold", OFFSET(progressive_threshold), AV_OPT_TYPE_FLOAT, {.dbl = 1.5}, -1, FLT_MAX, FLAGS }, |
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| 64 | { NULL } |
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| 65 | }; |
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| 66 | |||
| 67 | AVFILTER_DEFINE_CLASS(idet); |
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| 68 | |||
| 69 | static const char *type2str(Type type) |
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| 70 | { |
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| 71 | switch(type) { |
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| 72 | case TFF : return "Top Field First "; |
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| 73 | case BFF : return "Bottom Field First"; |
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| 74 | case PROGRSSIVE : return "Progressive "; |
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| 75 | case UNDETERMINED: return "Undetermined "; |
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| 76 | } |
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| 77 | return NULL; |
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| 78 | } |
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| 79 | |||
| 80 | static int filter_line_c(const uint8_t *a, const uint8_t *b, const uint8_t *c, int w) |
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| 81 | { |
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| 82 | int x; |
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| 83 | int ret=0; |
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| 84 | |||
| 85 | for(x=0; x |
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| 86 | int v = (*a++ + *c++) - 2 * *b++; |
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| 87 | ret += FFABS(v); |
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| 88 | } |
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| 89 | |||
| 90 | return ret; |
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| 91 | } |
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| 92 | |||
| 93 | static int filter_line_c_16bit(const uint16_t *a, const uint16_t *b, const uint16_t *c, int w) |
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| 94 | { |
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| 95 | int x; |
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| 96 | int ret=0; |
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| 97 | |||
| 98 | for(x=0; x |
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| 99 | int v = (*a++ + *c++) - 2 * *b++; |
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| 100 | ret += FFABS(v); |
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| 101 | } |
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| 102 | |||
| 103 | return ret; |
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| 104 | } |
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| 105 | |||
| 106 | static void filter(AVFilterContext *ctx) |
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| 107 | { |
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| 108 | IDETContext *idet = ctx->priv; |
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| 109 | int y, i; |
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| 110 | int64_t alpha[2]={0}; |
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| 111 | int64_t delta=0; |
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| 112 | Type type, best_type; |
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| 113 | int match = 0; |
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| 114 | |||
| 115 | for (i = 0; i < idet->csp->nb_components; i++) { |
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| 116 | int w = idet->cur->width; |
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| 117 | int h = idet->cur->height; |
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| 118 | int refs = idet->cur->linesize[i]; |
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| 119 | |||
| 120 | if (i && i<3) { |
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| 121 | w = FF_CEIL_RSHIFT(w, idet->csp->log2_chroma_w); |
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| 122 | h = FF_CEIL_RSHIFT(h, idet->csp->log2_chroma_h); |
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| 123 | } |
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| 124 | |||
| 125 | for (y = 2; y < h - 2; y++) { |
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| 126 | uint8_t *prev = &idet->prev->data[i][y*refs]; |
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| 127 | uint8_t *cur = &idet->cur ->data[i][y*refs]; |
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| 128 | uint8_t *next = &idet->next->data[i][y*refs]; |
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| 129 | alpha[ y &1] += idet->filter_line(cur-refs, prev, cur+refs, w); |
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| 130 | alpha[(y^1)&1] += idet->filter_line(cur-refs, next, cur+refs, w); |
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| 131 | delta += idet->filter_line(cur-refs, cur, cur+refs, w); |
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| 132 | } |
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| 133 | } |
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| 134 | |||
| 135 | if (alpha[0] > idet->interlace_threshold * alpha[1]){ |
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| 136 | type = TFF; |
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| 137 | }else if(alpha[1] > idet->interlace_threshold * alpha[0]){ |
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| 138 | type = BFF; |
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| 139 | }else if(alpha[1] > idet->progressive_threshold * delta){ |
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| 140 | type = PROGRSSIVE; |
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| 141 | }else{ |
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| 142 | type = UNDETERMINED; |
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| 143 | } |
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| 144 | |||
| 145 | memmove(idet->history+1, idet->history, HIST_SIZE-1); |
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| 146 | idet->history[0] = type; |
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| 147 | best_type = UNDETERMINED; |
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| 148 | for(i=0; i |
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| 149 | if(idet->history[i] != UNDETERMINED){ |
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| 150 | if(best_type == UNDETERMINED) |
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| 151 | best_type = idet->history[i]; |
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| 152 | |||
| 153 | if(idet->history[i] == best_type) { |
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| 154 | match++; |
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| 155 | }else{ |
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| 156 | match=0; |
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| 157 | break; |
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| 158 | } |
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| 159 | } |
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| 160 | } |
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| 161 | if(idet->last_type == UNDETERMINED){ |
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| 162 | if(match ) idet->last_type = best_type; |
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| 163 | }else{ |
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| 164 | if(match>2) idet->last_type = best_type; |
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| 165 | } |
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| 166 | |||
| 167 | if (idet->last_type == TFF){ |
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| 168 | idet->cur->top_field_first = 1; |
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| 169 | idet->cur->interlaced_frame = 1; |
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| 170 | }else if(idet->last_type == BFF){ |
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| 171 | idet->cur->top_field_first = 0; |
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| 172 | idet->cur->interlaced_frame = 1; |
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| 173 | }else if(idet->last_type == PROGRSSIVE){ |
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| 174 | idet->cur->interlaced_frame = 0; |
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| 175 | } |
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| 176 | |||
| 177 | idet->prestat [ type] ++; |
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| 178 | idet->poststat[idet->last_type] ++; |
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| 179 | av_log(ctx, AV_LOG_DEBUG, "Single frame:%s, Multi frame:%s\n", type2str(type), type2str(idet->last_type)); |
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| 180 | } |
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| 181 | |||
| 182 | static int filter_frame(AVFilterLink *link, AVFrame *picref) |
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| 183 | { |
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| 184 | AVFilterContext *ctx = link->dst; |
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| 185 | IDETContext *idet = ctx->priv; |
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| 186 | |||
| 187 | if (idet->prev) |
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| 188 | av_frame_free(&idet->prev); |
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| 189 | idet->prev = idet->cur; |
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| 190 | idet->cur = idet->next; |
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| 191 | idet->next = picref; |
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| 192 | |||
| 193 | if (!idet->cur) |
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| 194 | return 0; |
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| 195 | |||
| 196 | if (!idet->prev) |
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| 197 | idet->prev = av_frame_clone(idet->cur); |
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| 198 | |||
| 199 | if (!idet->csp) |
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| 200 | idet->csp = av_pix_fmt_desc_get(link->format); |
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| 201 | if (idet->csp->comp[0].depth_minus1 / 8 == 1) |
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| 202 | idet->filter_line = (void*)filter_line_c_16bit; |
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| 203 | |||
| 204 | filter(ctx); |
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| 205 | |||
| 206 | return ff_filter_frame(ctx->outputs[0], av_frame_clone(idet->cur)); |
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| 207 | } |
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| 208 | |||
| 209 | static av_cold void uninit(AVFilterContext *ctx) |
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| 210 | { |
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| 211 | IDETContext *idet = ctx->priv; |
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| 212 | |||
| 213 | av_log(ctx, AV_LOG_INFO, "Single frame detection: TFF:%d BFF:%d Progressive:%d Undetermined:%d\n", |
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| 214 | idet->prestat[TFF], |
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| 215 | idet->prestat[BFF], |
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| 216 | idet->prestat[PROGRSSIVE], |
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| 217 | idet->prestat[UNDETERMINED] |
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| 218 | ); |
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| 219 | av_log(ctx, AV_LOG_INFO, "Multi frame detection: TFF:%d BFF:%d Progressive:%d Undetermined:%d\n", |
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| 220 | idet->poststat[TFF], |
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| 221 | idet->poststat[BFF], |
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| 222 | idet->poststat[PROGRSSIVE], |
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| 223 | idet->poststat[UNDETERMINED] |
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| 224 | ); |
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| 225 | |||
| 226 | av_frame_free(&idet->prev); |
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| 227 | av_frame_free(&idet->cur ); |
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| 228 | av_frame_free(&idet->next); |
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| 229 | } |
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| 230 | |||
| 231 | static int query_formats(AVFilterContext *ctx) |
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| 232 | { |
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| 233 | static const enum AVPixelFormat pix_fmts[] = { |
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| 234 | AV_PIX_FMT_YUV420P, |
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| 235 | AV_PIX_FMT_YUV422P, |
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| 236 | AV_PIX_FMT_YUV444P, |
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| 237 | AV_PIX_FMT_YUV410P, |
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| 238 | AV_PIX_FMT_YUV411P, |
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| 239 | AV_PIX_FMT_GRAY8, |
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| 240 | AV_PIX_FMT_YUVJ420P, |
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| 241 | AV_PIX_FMT_YUVJ422P, |
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| 242 | AV_PIX_FMT_YUVJ444P, |
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| 243 | AV_PIX_FMT_GRAY16, |
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| 244 | AV_PIX_FMT_YUV440P, |
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| 245 | AV_PIX_FMT_YUVJ440P, |
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| 246 | AV_PIX_FMT_YUV420P10, |
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| 247 | AV_PIX_FMT_YUV422P10, |
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| 248 | AV_PIX_FMT_YUV444P10, |
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| 249 | AV_PIX_FMT_YUV420P16, |
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| 250 | AV_PIX_FMT_YUV422P16, |
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| 251 | AV_PIX_FMT_YUV444P16, |
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| 252 | AV_PIX_FMT_YUVA420P, |
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| 253 | AV_PIX_FMT_NONE |
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| 254 | }; |
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| 255 | |||
| 256 | ff_set_common_formats(ctx, ff_make_format_list(pix_fmts)); |
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| 257 | |||
| 258 | return 0; |
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| 259 | } |
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| 260 | |||
| 261 | static int config_output(AVFilterLink *outlink) |
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| 262 | { |
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| 263 | outlink->flags |= FF_LINK_FLAG_REQUEST_LOOP; |
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| 264 | return 0; |
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| 265 | } |
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| 266 | |||
| 267 | static av_cold int init(AVFilterContext *ctx) |
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| 268 | { |
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| 269 | IDETContext *idet = ctx->priv; |
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| 270 | |||
| 271 | idet->last_type = UNDETERMINED; |
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| 272 | memset(idet->history, UNDETERMINED, HIST_SIZE); |
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| 273 | |||
| 274 | idet->filter_line = filter_line_c; |
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| 275 | |||
| 276 | return 0; |
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| 277 | } |
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| 278 | |||
| 279 | |||
| 280 | static const AVFilterPad idet_inputs[] = { |
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| 281 | { |
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| 282 | .name = "default", |
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| 283 | .type = AVMEDIA_TYPE_VIDEO, |
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| 284 | .filter_frame = filter_frame, |
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| 285 | }, |
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| 286 | { NULL } |
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| 287 | }; |
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| 288 | |||
| 289 | static const AVFilterPad idet_outputs[] = { |
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| 290 | { |
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| 291 | .name = "default", |
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| 292 | .type = AVMEDIA_TYPE_VIDEO, |
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| 293 | .config_props = config_output, |
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| 294 | }, |
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| 295 | { NULL } |
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| 296 | }; |
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| 297 | |||
| 298 | AVFilter avfilter_vf_idet = { |
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| 299 | .name = "idet", |
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| 300 | .description = NULL_IF_CONFIG_SMALL("Interlace detect Filter."), |
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| 301 | .priv_size = sizeof(IDETContext), |
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| 302 | .init = init, |
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| 303 | .uninit = uninit, |
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| 304 | .query_formats = query_formats, |
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| 305 | .inputs = idet_inputs, |
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| 306 | .outputs = idet_outputs, |
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| 307 | .priv_class = &idet_class, |
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| 308 | }; |